ERA
Shawn Armstrong · Season-by-season history
ERA over time
- Cleveland Guardians · MLB
- Seattle Mariners · MLB
- Baltimore Orioles · MLB
- Tampa Bay Rays · MLB
- Texas Rangers · MLB
Hover over a point for its value. Only numeric values with a recorded season are charted; missing seasons are not treated as zero.
| Season | Team | League | ERA |
|---|---|---|---|
| 2025 |  Texas Rangers |
MLB | 2.31 |
| 2024 |  Tampa Bay Rays |
MLB | 5.40 |
| 2023 | Tampa Bay Rays |
MLB | 1.38 |
| 2022 | Tampa Bay Rays |
MLB | 3.60 |
| 2021 |  Baltimore Orioles |
MLB | 8.55 |
| 2020 | Baltimore Orioles |
MLB | 1.80 |
| 2019 |  Seattle Mariners |
MLB | 14.73 |
| 2018 | Seattle Mariners |
MLB | 1.23 |
| 2017 |  Cleveland Guardians |
MLB | 4.38 |
| 2016 | Cleveland Guardians |
MLB | 2.53 |
| 2015 | Cleveland Guardians |
MLB | 2.25 |